Added performance tests tools

1 files changed, 99 insertions, 0 deletions

diff --git a/tests/performance/substringsearch.c b/tests/performance/substringsearch.c
new file mode 100644
index 000000000..be4f61e4f
--- /dev/null
+++ b/tests/performance/substringsearch.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2011-22 - ntop.org
+ *
+ * nDPI is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * nDPI is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with nDPI.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <math.h>
+
+#include "ndpi_api.h"
+
+u_int64_t timeval2usec(const struct timeval *tv) {
+  return(tv->tv_sec*1000000+tv->tv_usec);
+}
+
+float tdiff2sec(const struct timeval *begin, const struct timeval *end) {
+  u_int64_t b = timeval2usec(begin);
+  u_int64_t e = timeval2usec(end);
+  u_int64_t diff = e - b;
+  
+  return((float)diff / 1000000.);
+}
+
+
+int main(int argc, char *argv[]) {
+  const char* top_file = "top-1m.csv";
+  FILE *fd = fopen(top_file, "r");
+  void *automa = ndpi_init_automa();
+  char * line = NULL;
+  size_t len = 0;
+  u_int32_t num = 0, num_search = 100, i;
+  ssize_t read;
+  struct timeval search, begin, end;
+  u_int64_t tdiff;
+  
+  if(fd == NULL) {
+    printf("Unable to open file %s\n", top_file);
+    return(-1);
+  }
+  assert(automa);
+
+  printf("Building the automa...\n");
+
+  gettimeofday(&begin, NULL);
+  
+  while ((read = getline(&line, &len, fd)) != -1) {
+    char *t = strtok(line, ",");
+
+    if(t) t =  strtok(NULL, "\n");
+
+    if(t != NULL) {
+      u_int len = strlen(t);
+      
+      t[len] = '\0';
+
+      assert(ndpi_add_string_to_automa(automa, ndpi_strdup(t)) == 0);
+      num++;
+
+      if(num == 100000) break;
+    }
+  }
+  
+  fclose(fd);
+
+  ndpi_finalize_automa(automa);
+
+  gettimeofday(&search, NULL);
+  
+  printf("Automa with %u words built successfully in %.1f sec [%.1f MB]\n",
+	 num, tdiff2sec(&begin, &search),
+	 (float)ndpi_get_tot_allocated_memory()/(float)(1024*1024));
+
+  gettimeofday(&search, NULL);
+  for(i=0; i<num_search; i++)
+    assert(ndpi_match_string(automa, "github.com") == 1);
+  gettimeofday(&end, NULL);
+  
+  printf("String searched in %.2f usec\n",
+	 (float)(timeval2usec(&end) - timeval2usec(&search))/(float)num_search);
+  
+  ndpi_free_automa(automa);
+
+  return(0);
+}